전극 촉매 Pt-Ni 및 Pt-Co를 이용한 수전해용 공유가교 CL-SPEEK/HPA 막전극의 특성

우제영,이광문,지봉철,정장훈,문상봉,강안수 한국수소및신에너지학회 2010 한국수소 및 신에너지학회논문집 Vol.21 No.1

The electrocatalystic prperties of Pt-Co and Pt-Ni with heteropolyacids (HPAs) entrapped in covalently cross-linked sulfonated poly(ether ether ketone) (CL-SPEEK)/HPA membranes were investigated for water electrolysis. The HPAs, including molybdophosphoric acid (MoPA), and tungstophosphoric acid (TPA) were both used as membrane additives and electrocatalysts. The membrane electrode assembly (MEA) was prepared by a nonequilibrium impregnation-reduction (I-R) method. Pt(NH3)4Cl2, NiCl2 and CoCl2 as electrocatalytic materials and NaBH4 as reducing agent were used. I order to enhance electrocatalytic activity, the catalyst layer prepared above was electrodeposited (Dep) with HPA. Surface morphologies and physico-chemical properties of MEA were investigated by means of SEM, EDX and XRD. The electrocatalytic properties of composite membranes such as the cell voltage and coulombic charge in CV were in the order of magnitude: CL-SPEEK/ MoPA40 (wt%) > CL-SPEEK/TPA30 > Nafion117. In the optimum cell applications for water electrolysis, the cell voltage of Pt/CL-SPEEK-MoPA40/Pt-Co (Dep-MoPA) and Pt/CL-SPEEK-TPA30/Pt-Co (Dep-TPA) was 1.75 V at 80℃ and 1 A/cm2 and voltage efficiency was 87.1%. Also, the observed activity of Pt-Co (84:16 atomic ratio by EDX) is a little higher than that of Pt-Ni (86:14). The current density peak of electrodeposited electrodes were better a little than those of unactivated electrodes based on the same membranes.

성숙한 쥐와 어린 쥐에서 일측 신 절제 후 보상성 신 비대시 유식세포 측정기를 이용한 세포 증식 비교

우제영,방병기 가톨릭대학 (가톨릭신학대학) 대학원 1994 가톨릭大學醫學部 論文集 Vol.47 No.1

특발성 과호산구성 증후군에 병발한 Immunotactoid Glomerulopathy 1예

이정득,우제영,윤영석,강성구,방병기,양기화,지영희,심상인 대한내과학회 1992 대한내과학회지 Vol.42 No.5

저자들은 수술 전 시행한 말초혈액검사에서 우연히 호산구증다증이 발견되어 여러 검사를 거쳐 과호산구성 증후군으로 진단된 환자가 중증 단백뇨의 소견을 보여 신장 조직검사를 실시하였다. 조직검사 결과 광학현미경 소견상 신사구체 모세관 기저막의 비후와 부종성 변화를 보이는 세포 및 섬유성 물질에 의하여 모세관 내강이 막혀있는 소견과 면역형광현미경 검사상 IgG, C3가 모세관 벽을 따라 침착된 소견을 보였고 전자현미경 검사상 내피세포 하부의 기저막에 직경 20nm의 섬유성 물질의 침착을 보였고 유전분증의 진단적 가치를 가지는 염색법인 Congo red에 음성을 보였다. 이상과 같은 소견은 immunotactoid glomerulopathy에 합당하다고 생각되어 문헌고찰과 함께 보고하는 바이다. The immunotactoid glomerulopathy is a recently described entity characterized histologically by highly organized ultrastructural deposits that appears to be composed of immunoglobulin and complement and are negative for amyloid by Congo red stain. The idiopathic hypereosinophilic syndrome is a disease characterized by idiopathic eosinophilia in blood and eosinophilic infiltration of multiple organs. Although all organ systems can be virtually involved, renal involvement is rare. The authors have experienced a case of idiopathic hypereosinophilic syndrome in a 18-year-old male who showed asymptomatic proteinuria of nephrotic range. Renal biopsy revealed the findings of thickening of the glomerular capillary basement membranes and deposits within the capillary lumen by light microscopy. Immunofluoresence microscopy disclosed IgG and C3 in mesangial regions and capillary walls. Electron microscopy showed highly organized, fibrillary structures measuring about 20 nm in the mesangial matrix and basement membrane. Congo red staining for amyloid was negative. This case was thought to represent an instance of immunotactoid glomerulopathy.

연하곤란을 동반한 상부식도 Web 1 예

김재광,우제영,김부성,정인식,선희식,송기호,홍현상,서정화 대한내과학회 1988 대한내과학회지 Vol.35 No.6

Upper esophageal webs occur when the mucosal membranes project into the esophageal lumen. It can be associated with a number of condition, including iron deficiency anemia, dysphagia, carcinoma, glossitis, thyroid disease, ulcerative colitis, rheumatoid arthritis, pernicious anemia, epidermolysis bullosa, and pemphigoid. Recently we experienced a case of upper esophageal web with rheumatoid arthritis. A 53-year-old woman had complained of dysphagia for 15 years. Esophagogram showed a symmetrical annular web projecting into the esaphagus at the level of the 6th cervical vertebra. Electric cutting of the web and bougienage during endoscopy were performed successfully and she became well after these procedures. Hence, we present a case of upper esophageal web and a review of literature.

내시경검사상 조기위암에서 진해위암으로 이행된 1예 보고

정인식,우제영,김부성,선희식,송기호 대한소화기내시경학회 1988 Clinical Endoscopy Vol.8 No.1

Early gastric cancer is defined carcinoma that is limited to the gastric mucosa and submucosa and that does not extend into the muscularis propria. The development and widespread use of upper gnstrointestinal endoscopy with biopsy and cytology have enhanced our ability to make early diagnosis of gastrie carcinoma. Gastric cancinoma is being diagnosed at an ealry stage aad the survival rates for these patients are significantly greater than those with advanced gastric carcinoma. These ealry lesion can be cured in over 90% of the cases. In fact, it is almost impossible to follow up cases of early gastric cancer without surgical treatment. We report a case developed advanced gastric carcinoma 34 months after initial endoseopic diagnosis of early gastric cancer. A, 48-year-old woman was diagnosed early gaatrie cancer on June 21, 1985 by endoscopy. Proper surgical intetvention was not carried out due to her liver cirrhosis. The follow-up endoscopic examination was done on March 16, 1988. The gastric cancer looked like an advanced stomach and extended to other site.

수전해용 Pt/공유가교 SPEEK-HPA 복합막/Pt-Ru MEA의 전기화학적 특성

황용구,우제영,이광문,정장훈,문상봉,강안수 한국수소및신에너지학회 2009 한국수소 및 신에너지학회논문집 Vol.20 No.3

The electrocatalytic properties of heteropolyacids(HPAs) entrapped in covalently cross-linked sulfonated polyetheretherketone(CL-SPEEK/HPA) membranes have been studied for water electrolysis. The HPAs, including tungstophosphoric acid(TPA), molybdophosphoric acid(MoPA), and tungstosilicic acid(TSiA) were used as additives in the composite membranes. The MEA was prepared by a non-equilibrium impregnation-reduction(I-R) method, using reducing agent, sodium borohydride(NaBH4) and tetraamineplatinum (II) chloride(Pt(NH3)4Cl2). The electrocatalytic properties of composite membranes such as the cell voltage were in the order of magnitude CL-SPEEK/MoPA40 (wt%) > /TPA30 > /TSiA40. In the optimum cell applications for water electrolysis, the cell voltage of Pt/PEM/Pt-Ru MEA with CL-SPEEK/TPA30 membrane was 1.75 V at 80℃ and 1 A/cm2 and this voltage carried lower than that of 1.81 V of Nafion 117. Consequently, in regards of electrochemical and mechanical characteristics and oxidation durability, the newly developed CL-SPEEK/TPA30 composite membrane exhibited a better performance than the others, but CL- SPEEK/MoPA40 showed the best electrocatalytic activity (1.71 V at 80℃ and 1 A/cm2) among the composite membranes.

기관지 폐포 세척술로 확인된 백혈병 세포의 폐침윤

박종원,박성학,우제영,송정섭,김춘추,한치화,김동집,양철우 대한내과학회 1988 대한내과학회지 Vol.35 No.3

In the vast majority of acute or chronic leukemia cases, pulmonary lesions have proven to be manifestations of infection, pulmonary hemorrhage, or hemorrhagic infarction. Leukemic infiltrates may be found in the lungs at autopsy in a high proportion of patients who die with either acute or chronic leukemia. In the vast majority of these case, there are no roentgenographic manifestations of these infiltrates. Pulmonary infilfration by leukemic cells resulting in respiratory symptoms is a rare complication of acute leukemia. We report a case of a patient with acute lymphocytic leukemia during the partial remission state, who presented with acute onset of fever with chill, in whom the diagnosis of pulmonary invasion of leukemic cells was made by bronchoalveolar lavage.

Preparation of Micron-Size Polydivinybenzene Particles Using Al₂O₃SiO₂ Mem-brane Emulsification Method

우종표,엄기범,우제영,이용권,이용희 한국고분자학회 2007 한국고분자학회 학술대회 연구논문 초록집 Vol.2007 No.4

신조직검사를 시행한 Acute Focal Bacterial Nephritis 1예

민창기,이숙영,우제영,구완서,윤영석,방병기,김희나 대한내과학회 1992 대한내과학회지 Vol.42 No.3

당뇨병을 갖고 있으면서 발열과 측복통을 주소로 내원한 환자에서 요분석 및 배양검사와 방사선학적인 검사로 AFBN으로 진단된 경우 신조직 검사를 시행한 1예를 경험하였기에 문헌 고찰과 함께 보고하는 바이다. AFBN is a form of acute pyelonephritis. Many of the patients in this series had either a history of diabetes or reflux nephropathy. On Sonograpnhy or CT scanning, it was poorly marginated lower density mass which significantly responded to the administration of antibiotics. It is important not to confuse AFBN with renal abscess of neoplasm, which it may simulate, as this might lead to inappropriately surgical therapy. Histologically, the disease is characterised by chronic narture such as fibrosis and monouclear cell infiltration, being admixed with acute and chronic inflammation.

신이식 환자에서 성공적인 임신 4예

윤선애,안석주,우제영,김석영,윤영석,방병기 대한내과학회 1992 대한내과학회지 Vol.42 No.5

Recently, we have experienced 4 cases of successful pregnancies in renal allograft recipients. There were no rejection of allograft, congenital anomaly and intrauterine growth retardation. Our finding suggest that we can be reasonably optimistic about the outcome of pregnacy in patient with a well functioning renal transplant. But we think it is important to control blood pressure strictly during pregnancy and more safe to wait at least 2 years following transplant before becoming pregnant.